I am trying to build vivi driver in linux kernel..
I tried using make menuconfig but i didnt see any option to enable vivi driver.
Can someone tell me the process to enable vivi drivers in kernel
-kiran
LINUX KERNEL 3.12 :
The support for vivi [virtual video driver] can be enable by following:
Device Driver --> Multimedia support --> Cameras/video grabbers support --> Media test drivers --> Virtual Video Driver.
It's under 'Device Drivers' -> 'Multimedia support' -> 'Video capture adapters' -> 'Virtual Video Driver'.
It has dependencies on VIDEO_DEV, VIDEO_V4L2 and ( FRAMEBUFFER_CONSOLE or STI_CONSOLE ).
It's also not supported on Sparc machines.
Reading the Kconfig files is usually the best place to start looking for this kind of thing.
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I am currently writing an OS based on ARMv8 processor. I want to find an emulator that acts like the processor so I can see my OS working or not and to check my work.
I am on windows 10. are there any emulators recommended ?
I searched SO but no answer. thanks.
Looks like QEMU version 2.1+ is what you want
the latest version of upstream QEMU (2.1) now includes full ARMv8 system emulation support. This means that users can use upstream QEMU to run a full 64-bit ARMv8-A kernel and filesystem, such as a 64-bit Ubuntu cloud image. This was no small endeavour as it involved emulating a completely new instruction set, exception model, CPU implementation, and more. The implementation was verified with a custom instruction verification tool (RISU) and was heavily reviewed upstream by an engaged and incredibly supportive upstream QEMU community.
source
So I will start off by saying that I do NOT want know how to setup or run QT on the pi. I am specifically trying to setup Qt Creator 4.0.3 (Based on Qt 5.7.0 (MSVC 2013, 32 bit)) to write and compile C++ and the run it on the Raspberry pi 2. I have found that running qt on the pi is far to slow.
I have searched for two days to find the right toolchain download for qt/raspberry and its corresponding qt configuration. Nothing seems to work. I have found what seems like a thousand dead ends searching the web. I can write and compile apps for windows console fine. But finding information to cross compile for raspberry seems to be an elusive Unicorn!
Does anyone have this working??? If so which of the many toolchains did you use? And please help me replicate your QT configuration. The closest I have come is using the GCC ARM Embedded toolchain but I cant seem to get the QT options set correctly and I believe that only gets me part of the way there. My ultimate goal is to control GPIO and use the RadioHead library.
Thanks in advance!
I also wanted to do that, and I actually achieved it, It's called "cross-compilation", you build on the Main PC and then compile it to the target.
Initially I wanted to use my main PC with windows 10, but I ended creating a linux partition on my pc to do it since I didn't found any way to do it with windows.
Qt has a very comprehensive tutorial with Qt5 and RaspberryPi2 (both with linux), the only problem is you need linux on your pc to do it. If you want to do this I would suggest following this steps:
Create a linux partition with the same os as in the pi (for example raspbian and debian) and name the username (in linux) "pi" and the password "raspberry". This will help you with external libraries.
Install Qt for Linux on your new partition
Follow Qt's tutorial on https://wiki.qt.io/RaspberryPi2EGLFS
The tutorial is really straightforward, I really recommend it.
Good Luck.
Can you use the CMSIS, HAL, TM libraries for STM32F407 discovery board with eclipse, without STM32Cube? According to this link http://www.carminenoviello.com/en/2015/06/04/stm32-applications-eclipse-gcc-stcube/ you can do it with eclipse & STM32Cube. But I wonder if you can do just same thing without the STM32Cube. Since I'm using OS X, it is impossible to install the STM32Cube, but in order to use the GPIO library I need to use CMSIS, HAL, TM libraries.
You might be able to used the older "Standard Peripheral Driver" model - which was a just a distributed set of driver files specific to the chip. These libraries are no longer supported and are replaced by STM32Cube which generates equivalent code - but with better support for hardware abstraction however they are still very useable.
Search "STM32F4xx_StdPeriph_Driver" to locate the libraries (which include the standard peripheral drivers and CMSIS).
You can download the libraries as a separate zip file
http://www.st.com/web/en/catalog/tools/PF259243
just unpack it and import whatever you need from it into your project. You can take an example project which is closest to your needs, and start developing your application from that. That's what I did in Linux.
There is the STM32CubeMX, which is the installable program you're referring to, and there are STM32CubeF4, STM32CubeL0, etc, which are the firmware package for the different controller families.
CubeMX now officially supports Mac and Linux. However here is an old post how to run it manually http://www.carminenoviello.com/2015/09/09/running-stm32cubemx-macos-finally/.
Regarding the HAL and SPL I'll add that there are really nice libraries in libopencm3 which are developed by community and are not so "buggy" as HAL or SPL.
I found an interesting instruction. You can install the STM32CubeMX on OS X. http://www.stm32duino.com/viewtopic.php?t=267
There is an Eclipse based IDE by OpenSTM32 community called SW4STM32. Available at OpenSTM32 community's site. System Workbench for STM32 installer has been released on the following platforms:
Microsoft Windows Vista and newer (32 bits or 64 bits)
Linux (32 bits or 64 bits)
Mac OSX 10.10 Yosemite and newer + Xcode 7
Java SE JRE 7 or newer
When creating a project you can choose which library you want want to use, SPL, HAL or baremetal.
STM32CubeMX is a initialization code generator. It definitely eases development, but you can write you code completely from the beginning.
STM32CubeMX uses HAL as its Library. You can download the HAL and Include the files that you need and write down the code from scratch. You just need to be aware of the APIs, which are documented in UM1725 Application Note.
But, now STM32CubeMX is also available for Linux and Mac.
I have an external hard drive connected to my computer via USB cable with Linux OS installed on it.
Is there a way that i can run this Linux while using Windows?
Like in virtual machine or something like that?
You can but you'll need to download a good enough emulator not small ones such as Bochs.Then configure the settings of the emulator such that it boots up the USB drive.Let me know which emulator you'd be using and I will help you setup if I know.
Yes you can. You'll need to download Oracle VM VirtualBox and use that. Its very easy to use. Just after you set up the Virtual machine you'll need to tell it to boot from usb.
Is it possible to change configuration of a OMAP3 gpmc after boot-up on linux? I am writing a driver for a device that use the OMAP3 gpmc bus. We would prefer to be able to load the driver only when needed. Would linux allow it, since the GPMC control also program memory?
(If you haven't done it already, I suggest you join TI e2e community: there are many ongoing discussions about TI OMAP architecture and TI engineers overview the forums to provide answers).
You could specify a device driver as built-in or module when you configure the kernel. You can load that module later on with the insmod command. That option depends on your target architecture, of course.